.navigation-main {
    position: fixed;
    z-index: 99;
    display: flex;
    /* flex-direction: row; */
    width: 100%;
    /* flex-wrap: wrap; */
    /* overflow:hidden; */
    /* border-bottom: rgb(187, 184, 182) 1px solid; */
    background-color: var(--bg-color-six);
    top: 0;
}   

.navigation-item {
    height: 60px;
    display: flex;
    align-items: center;
    /*垂直方向居中*/
    justify-content: center;
    /*水平方向居中*/
    padding: 0 0.5em;
}

.navigation-item a{
    font-weight: 600;
    text-decoration: none;
    color: var(--normal-font-color);
}

.navigation-item a:hover{
    color: var(--font-thirteen);
}